Rep. Cao brought his daughter to a town-hall event last month that President Obama held in New Orleans.

Washington (CNN) - Rep. Anh "Joseph" Cao was the only Republican to vote in favor of the Democratic health care bill that passed the House late Saturday, a vote that came after President Obama called to personally to ask for his support, Cao told CNN.

The president dialed the freshman congressman from Louisiana around noon on Saturday, hours before a vote on an amendment offered by anti-abortion Democrats that banned most abortion coverage from the public option and other insurance providers in the insurance "exchange" the legislation would create. That measure passed later in the evening.

Cao said he explained to the president he could not support the health care bill without the amendment, but said he would support the bill if the abortion measure passed. It was a sentiment he also expressed to House GOP leadership ahead of the vote, he said.

The final vote came after several discussions about the bill with White House officials.

Cao, who hails from one of the most Democratic districts in the country, also asked the president for assurances that the administration would do more to help with ongoing disaster relief efforts in his New Orleans district, specifically by forgiving millions in disaster loans to the region.